APPENDICES
Mean
pressure
Maxi-
Mini-
mum
Mean
num
at mean air temp- sea level
air temp-
air temp-
Meun dew
Mean relative
Mean
Total
Prevailing
Mean
amount bright Total
wind
wind
erature
erature
erature
point
humidity
of cloud
sunshine
rainfall
direction
speed
Month
(hectopascals)
(°C)
(°C)
(°C)
(°C)
(%)
(%)
(hours)
(mm)
(degrees)
(km/h)
January
1 019.5
24.0
17.0
7.2
12.2
74
64
130.7
70.3
050
25.7
February
1017.8
23.2
15.4
8.5
11.8
80
70
99.7
27.6
060
24.8
March
1 015.3
27.7
19.2
11.0
15.2
79
67
137.1
40.9
040
22.0
April
1011.1
30.2
23.1
19.0
20.4
85
85
77.3
547.7
070
21.8
May
1 008.6
32.4
26.1
20.6
22.3
80
75
148.5
208.3
080
21.3
June
1 007.1
34.2
28.3
21.8
24.0
78
70
207.1
443.3
230
22.7
July
1 003.5
33.2
28.8
24.5
24.9
80
71
221.9
304.0
240
23.9
August
1 004.5
33.3
28.5
24.1
24.9
81
71
176.4
600.7
240
17.0
September
I 009.0
32.2
27.7
23.9
21.9
72
61
217.2
152.6
080
23.7
October
1 011.9
31.2
26.0
18.7
21.5
77
70
165.5
204.1
080
32.5
November
1 016.6
26.5
21.0
14.1
16.0
74
68
119,6
96.8
010
28.7
December
1018.4
25.4
18.9
11.3
14.3
76
55
163.9
56.0
070
25.3
Year
1 011.9
34.2
23.3
7.2
19.1
78
69
1 864.9
2752.3
070
24.1
Climatological Normals (1961-1990)
Mean
pressure
al mean
Maxi-
mnum air temp-
Mini-
Mean air temp-
mun
air temp-
Mean dew
Mean relative
Mean
amount
sea level
erature
erature
erature
point
humidity
of cloud
Total bright sunshine
Month
(hectopascals)
(Cit
(°C)
(C)t
(°C)
(%)
(%)
Prevailing Total
wind rainfall direction (hours) (mm) (degrees)
Mean wind
speed
(km/h)
January
1 020.2
26.9
15.8
0.0
10.2
71
58
152.4
23.4
070
24.0
February
I 018.7
27.8
15.9
2.4
11.8
78
73
97.7
48.0
070
23.8
March
1 016.2
30.1
18.5
4.8
15.0
81
76
96.4
66.9
070
22.1
April
1 013.1
33.4
22.2
9.9
19.0
83
78
108.9
161.5
080
19.7
May
1 009.1
35.5
25.9
15.4
22.6
83
74
153.8
316.7
090
19.2
June
1 006.0
35.6
27.8
19.2
24.4
82
75
161.1
376.0
090
21.6
July
005.3
35.7
28.8
21.7
24.9
80
65
231.1
323.5
230
20.0
August
1 005.1
36.1
28.4
21.6
24.8
81
66
207.0
391.4
090
18.5
September
1 008.8
35.2
27.6
18.4
23.3
78
63
181.7
299.7
090
21.9
October
1 014.0
34.3
25.2
13.5
19.8
73
56
195.0
144.8
090
27.6
November
1 017.9
31.8
21.4
6.5
15.2
69
53
181.5
35.1
080
27,2
December
1 020.2
28.7
17.6
4.3
11.2
68
49
181.5
27.3
080
25.5
Year
1 012.9
36.1
23.0
0.0
18.6
77
65
1 948.1
2 214.3
080
22.6
Note: These extreme values are for the period 1884-1939; 1947-2000.
Source:
Hong Kong Observatory.
518
(Enquiry Telephone No.: 2926 8444)